Improvement in joiners  planes



PATBNTED'JAN. 25, 1870.

G, C. BEGKWITH.

JOINERS PLANE.

w: cams wens co, Monymwn msnmomw. u c.

@wird totr @wat dimite Letters Patent N 99,137, dated January 25, 1870.

i IMPROVEMENT IN JOINERS PLANES.

y me- The Schedule referred to :in these Letters Patent and making part ot the same I containing my invention.

`This plane has a stock, capable of being expanded and contracted, for the purpose of adapting vit to hold plane-irons or cut-ters, and throat-pieces, of diii'erent sizes or widths. 1t also has a new and peculiarmechanism for holding theplane-iron or cutter in place in the stock and throat-i-piece.

The stock is mainly composed of two 'jaws A B, the handle (l` being aixed to one of them', viz, that marked A.' l

' Screws a'a go through holes made inthe jaw B, and screw into projections ,b b, extended from the jaw A.

Furthermore, a duplex thumb-screw, D, goes through thenpper partsv of the mddles of the two `iaw's, and over` the plane-iron or cutter E, which, with a wooden base-,plate or throat-piece, F, is arranged between the -tivo jaws, in manneras represented.

The dupleXthumb-screw'has'two screw-.threads c d, which are pitched or run in opposite directions, relatively to one another, one being what is usually termed a right-hand screw, and the other 'a left hand screw.

One of these screws is screwed into the jaw-plate A, and th other into the jaw-plate B, the whole being -so-that aperson, by revolving the duplex screw in one direction, will cause the `iaw-plates to recede from one another, and, by turning the said sci-ew in the opposite direction, will cause the two plates or jaws to approach one another. 'Ihe screws a aserve to compress the jaws upon a throat-piece, when placed between them.

For better supporting a throat-piece by the jaws, I usually make each of the latter with a tongue, j, projecting from its, inner side, such tongue being to enter a corresponding groove, g, made in the next adjacent edge of the throat-piece.` This throat-piece may have a iiat.bottom,'or it may have a. bottom formed like that of any common moulding-plane.

It is intended, by my invention, to have a series of throat-pieces of dilerent widths, and also to have a series of planeirons or cutters, and cap-irons, to correspond with such, the same being to enable a joiner with one stock, and vsuoli a series of throat-pieces and plane-irons, and cap-irons, to compose such a plane as his necessities may require from time to time, whether' snchbe a plane for moulding, or for plane-surface work.

'flzhe throat-piece F has achip-throat, 7:-, made through it, such being to receive the plane-iron or cutter E, and the cap-"iron,

For the support of the plane-iron, the two jaw-plates are provided with rebated ledges, one of l which is shown at fi, in tig. 4.

, Furthermore, a stud, k, extends from the inner face .of each jaw-plate, in manner as shown in figs. 1 and 4. 'lhcse studs serve as ,bea-rings' or fnlcra for the sappiate, which is passed underneath both'of them, and, at its lower part, rests on the plane-iron or cutter.

There is, between the two screws of the thumbscrew 1), an arm, 1,`w hich turns freely on theshank of the screw, or is pivoted tothe screw, so as to be capable of turning up and down thereon.

A cammed lever, L, jointed to the said arm, either bears upon the plane-iron, or upon a spring, n, project-ed from the rear part of the arm, and resting'- on the plane-iron. f By pressing down the tail or handle o of the cammedI lever L, the arm Zwill be elevated against the capiron, and the cam p of the lever will be forced against the plane-iron, and thus, by means of the iron and the! canuned lever, andthe supports of the plane-iron and the cap-iron, such plane-iron and cap-iron may be faste ened simultaneously in place u the stock and throatpiece.

, In the above-described plane, I'blaim, as iny invention, .the following, viz:

The stock, as composed of the two jaws A B,\and their clamping and expanding dowel's or screws a l), substantially as set forth, in combination with a separate throat-piece, F, as explained.

Also, the combination of the arm lv and the cammed lever L, applied to the duplex extension-screw D, and

arranged with the planecutter'E and the cap-iron H, as explained; v p

' A GEORGE OYRUS `BEC-KWITH. Witnesses R. H. EDDY, S. N. PIPER. 

